Best Smartphone Battery Cases for 2025 Unveiled

Battery cases are a sleek solution to boost your smartphone or device’s power without the bulk of traditional portable chargers. Unlike clunky power banks, these cases integrate seamlessly with your phone, eliminating cable clutter.

Quick Picks – Top Smartphone Battery Cases:

Mophie Juice Pack Battery Case

0See it at Amazon

ZEROLEMON Battery Case

0See it at Amazon

Mophie Juice Pack Wireless

0See it at Amazon

NEWDERY Battery Case

0See it at Amazon

Mophie Juice Pack Connect

1See it at Amazon

A quality battery case should extend your phone’s battery life while offering solid protection. It must not block features like NFC or ports and should avoid excessive bulk. Support for wireless or fast charging adds convenience. However, some cases can be too heavy or fail to charge reliably. We’ve selected five top battery cases for leading smartphones to simplify your choice.

Need a new phone? Explore our top picks for the best smartphones available now, including highly rated Android devices, iPhones, and gaming-optimized phones.

Not into battery cases? Check our curated guides for other phone accessories, such as wireless chargers, portable power banks, and screen protectors to shield your iPhone 16 Pro from drops.

1. Mophie Juice Pack Battery Case

Top iPhone 16 Pro Battery Case

Mophie Juice Pack Battery Case

0Get robust protection, extra power, and a slim profile with this iPhone 16 Pro battery case. See it at Amazon

Product SpecificationsCapacity2,800 mAhSize6.5" x 2.9" x 0.71"Weight3.5 ounces

PROSCompact and lightweightFeatures integrated passive magnet for accessoriesCONSLimited battery capacity

The iPhone 16 Pro’s 3,582mAh battery handles moderate use well, but heavy tasks like photography, social media, or gaming drain it quickly. The Mophie Juice Pack Battery Case adds a 2,800mAh boost, connecting via USB-C with an indicator light to show charge levels. A standby mode prevents overcharging.

While it offers less capacity than some alternatives, this case extends the iPhone 16 Pro’s battery by about 50% while keeping things slim at 3.5 ounces. It’s easy to carry, fitting comfortably in pockets or bags, making it one of the top iPhone accessories.

With 6-foot drop protection, it safeguards your phone from falls, while raised edges protect the screen and camera. The integrated passive magnet supports accessory attachments, though wireless charging isn’t available.

2. ZeroLemon Battery Case

Top iPhone 16 Pro Max Battery Case

ZEROLEMON Battery Case

0Protect and power your iPhone 16 Pro Max with this durable case, featuring dual 5,000mAh batteries and military-grade protection. See it at Amazon

Product SpecificationsCapacity10,000 mAh (2 x 5,000 mAh)Size6.74" x 3.48" x 0.99"Weight8.5 ounces

PROSMilitary-grade protection with shockproofingSupports 18W fast chargingCONSNo data passthrough

The iPhone 16 Pro Max’s 4,685mAh battery is impressive, but intensive tasks like Cinematic Mode or Apple Arcade gaming can deplete it. ZeroLemon’s case, with two 5,000mAh batteries, provides roughly 1.5 extra charges. LED indicators display charge status.

Built with military-grade protection and shockproofing, this case ensures your phone’s safety but is bulkier, better suited for larger hands. Its 18W fast charging via USB-C powers your phone from 0% to 100% in about two hours. However, it lacks support for data passthrough or wired headsets.

3. Mophie Juice Pack Wireless

Top iPhone SE Battery Case

Mophie Juice Pack Wireless

0Power up your iPhone SE with this slim, protective case featuring a 2,525mAh battery and Qi wireless charging. See it at Amazon

Product SpecificationsCapacity2,525mAhSize2.81" x 4.14 x 0.66"Weight3.51 ounces

PROSSlim, lightweight designSupports Qi wireless chargingCONSOnly provides one full charge

The iPhone SE (2022) offers great performance for a budget smartphone but its 2,018mAh battery struggles with heavy use. The Mophie Juice Pack Wireless provides a full charge, extending usage time significantly.

This slim case adds protection without bulk, featuring safeguards against short-circuits, overcharging, and overheating. It supports Qi wireless charging, allowing you to charge both the case and phone without cables. Passthrough technology ensures compatibility with lightning cables and headphones without removing the case.

4. Newdery Battery Case

Top Samsung Galaxy S25 Battery Case

NEWDERY Battery Case

0Boost your Samsung Galaxy S25 with this 8,000mAh battery case, offering wireless charging and a compact design. See it at Amazon

Product SpecificationsCapacity8,000 mAhSizeNot listedWeight2.82 ounces

PROSDisplays charging percentagesSupports wireless chargingCONSHard to remove phone from case

The Samsung Galaxy S25’s 4,000mAh battery is robust for a compact Android phone, but heavy use like gaming or camera work drains it fast. The Newdery Battery Case adds 8,000mAh, enough for nearly two full charges, keeping your phone powered during demanding tasks.

This case connects via USB-C, supporting NFC and data transfer even when attached. It offers wireless and fast USB-C charging, plus TPU and PC materials for solid protection. It’s also available for Galaxy S25 Plus and Ultra models.

5. Mophie Juice Pack Connect

Top Universal Battery Case

Mophie Juice Pack Connect

1Attach this versatile 5,000mAh battery pack to any phone for wireless charging and a built-in stand. See it at Amazon

Product SpecificationsCapacity5,000 mAhSize2.7" x 4.09" x 0.56"Weight4.4 ounces

PROSUniversal Qi wireless charging designIncludes a standCONSSlightly tricky adapter attachment

Traditional battery cases become obsolete when you upgrade your phone. The Mophie Juice Pack Connect offers a future-proof solution, attaching a 5,000mAh battery to your device via a small anchor point on your phone or case.

Using Qi wireless charging, it supports various smartphones and recharges wirelessly. A built-in stand makes it ideal for watching videos or reviewing documents.

How to Pick the Right Battery Case

Selecting a battery case isn’t just about choosing the highest capacity. Oversized cases can be impractical for daily use. The best case balances battery life, size, and cost.

If you only need occasional charging, a portable charger might suffice. A battery case should fit comfortably in your pocket or bag, add protection, and avoid excessive weight. High-capacity cases often skip features like fast or wireless charging, which are crucial if you keep the case on constantly.

Battery Case FAQ

Are battery cases safe for your phone?

Yes, when used correctly, battery cases won’t harm your phone’s battery. They supply power directly, and smartphones have built-in protections to prevent overcharging. Ensure the case has proper ventilation to avoid overheating.

Should you fully drain a battery case before recharging?

No, lithium-based batteries in cases don’t need to be fully drained. Doing so may even reduce their lifespan over time.